Impossible to claim rewards on first epoch if bonding occurs before epoch creation

[kerber0x]

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Steps to Reproduce

1. Execute X transaction on the vault contract
2. ...
3. ...

Expected results:

Actual results:

There's an edge case that prevents users from claiming rewards from the first epoch if they bond before said epoch is created.

This might have to do with how the weight is calculated.

How to reproduce:

1. Deploy liquidity hub
2. Bond assets to whale lair
3. Set the genesis epoch to start in the future
4. Create the first epoch when the time comes
5. Try to claim with the account that bonded before

Expected:
Claim successful

Actual:
Can't claim

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Additional context

Add any other context about the problem here, code snippets, json responses and so on.

Code sample

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